code: def test_reload_jampack(jam_in, audio_file):
      # This test is to address #42, where mudaboxes reload as dict
      # instead of Sandbox
      jam = muda.load_jam_audio(jam_in, audio_file)
  
      jam2 = muda.load_jam_audio(six.StringIO(jam.dumps()), audio_file)
      assert isinstance(jam.sandbox.muda, jams.Sandbox)
      assert isinstance(jam2.sandbox.muda, jams.Sandbox)
  
file_path: muda/tests/test_core.py
imports: import tempfile
  import os
  import six
  import numpy
  import jams
  import librosa
  import muda
  import pytest
label_desc: Use image node_id 9 for calling a global function with example usage: test_reload_jampack(jam_in, audio_file) without return types